Drilling apparatus



July 19, 193s.. M. P. 'HOLMS 2,123,897

DRILLING APPARATUS Filed June 18, .1935 4 Sheets-Sheet l NNN.

July 19,1938. M. P. HOLMES 4pYRILLINcf APPARATUS Filed June 18, 1955 4 Sheets-Sheet 2 QS PQ E f .J mw mm. *5:2 s2.. ms ma f M wmv G w @ww V. QQ. x2. u 9% w s w. im. www y@ July 19, 1938. M. P. HOLMES DRILLING APPARATUS Filed June 18, 1935 4 Sheets-Sheet 3 diff;

Juny i9, 193s.. M P. HOLMES 123,897

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esame mit is, ieee PATENT @mit APPARATUS @massachusetts Application June la, i935, Serial No. W512i@ My invention relates to driuing apparatus, and, more particularly, to a drilling apparatus of the hydraulic type especially adapted to use in drilling coal or similar materials in mines, and in certain embodiments thereof especially adapted to operate from mine trackways.

An object or my invention is to provide an improved drilling apparatus. Another object of my invention is'to provide an improved drilling apparatus particularly adapted for drilling holes in coal or similar materials and having provision for permitting the insertion of a plurality of shot holes at different locations in the face while the machine remains on the traclrway. A iurther object of my invention is to provide an irnproved drilling apparatus having improved hydraulically actuated feeding and rotating means. Other objects and advantages of the invention will hereinafter more fully appear.

In the accompanying drawings, in which for purposes of illustration one embodiment and a modification which the invention may assume in practice has been shown,

Fig. 1 is a plan view of the illustrative embodiment of the invention,.with parts omitted.

Fig. 2 is a side elevation thereof, with parts omitted.

Fig. 3 is a fragmentary view with parts in elevation, but with the parts mainly shown ln sec- ?.0 tion on a plane corresponding to the line 3-3 of Fig. l.

Fig. 4 is a section through a portion of the feeding and rotating mechanism, the section being taken on the plane corresponding to the line 4-4 of Fig. 1.

Fig. 5 is a section taken on a plane corresponding to the line 5-5 of Fig. 2.

Fig. 6 is a detail horizontal section on a plane corresponding to the line 6-6 of Fig. 2, showing a portion o! the boom mounting.

. Fig. 7 isa fragmentary detail sectional view on a plane corresponding to the line I-l of Fig. 2, showing a locking device for maintaining the boom in a desired position.

Fig. 8 is a sectional view on a plane corresponding to the line 8-8 of Fig. 2, showing a portion of the boom and of the drill mounting on the latter.

Fig. 9 is a horizontal sectional view on a plane corresponding to the line 9 9 oi' Fig. 3, showlng a portion of the truck driving apparatus.

Fig. 10 is a detail of the hydrauliccontrol valve means. and

F18- 11 is fragmentary sectional view of a modication.

' While many o' the features of my invention may, with equal advantage, be incorporated in a drilling device other than a truck-supported one, I have shown. the illustrative embodiment incorporated in a truck mounted drill. A truck 5 frame i support-eden suitable wheels 2 supports a motor 3 which provides power for the propulsion of the truck and also for actuating the drill and effecting feeding and certain adjustments of the latter. The motor 3 is provided with suit- 10 able controlling apparatus located in a housing Il, and the truck is propelled through gearing driven from one end of the motor shaft il and including a-bevel driving pinion e, a, cooperating driven bevel gear l, a vertical shaft 8 15 on which the bevel gear l is mounted, a spur driving pinion 9 rotated by the shaft t, a larger driven gear I meshing with and driven by the spur gear 9, a bevel pinion I I coaxial with and driven by the spur gear Ii), and one or the other 20 of 'a pair of bevel gears I3 and Ill meshing with and driven by the bevel pinion II and selectively connectible under the control of suitable apparatus (not shown) through friction clutch devices I and i6 with a transverse shaft Il whose 25 opposite ends carry drive sprockets I8 and I9 respectively connected by chains 2u and 2| with the rear and forward axles of the truck. A reel 23 having an electrical cable 24 wound thereon is driven through suitable driving connections 30 2b from one of the axles.

The drilling apparatus proper comprises a vertical swivel mounting generally designated 3I, a boom 32 pivotable about a horizontal axis supported by the swivel mounting 3l and having a 35 forward portion 33 rotatable relative to the main body portion 34 of the boom, means generally designated 36 and providing a pivotal mounting transverse to the boom axis at the outer end of the boom, apparatus generally designated 31 for 40 providing a pivot axis at right angles to the transverse pivot axis at the outer end of the boom, and drill feeding and driving mechanism 38 supported by the apparatus 31. The forward end of the truck trame I provides an annular 45 upstanding ange 40 coaxial with which there is provided an opening 4I through the platform oi' the truck. Within the upstandlng flange 40 in I suitable bearing members 42 is rotatably mounted the annular base ange 43 of the, so-to-speak, 50

turntable support ofthe boom, the ilange 43 being held in position for rotation and against tipping by arcuate ange means 44 secured to the top of the flange 40. The base flange 43 supports a rotatable base portion 4l having lateral upstand- 55 ing sideportions 41 spaced apart and also providing forwardly and downwardly extending arm portions 48 laterally spaced apart. 'I'he side portions 41 provide bearings 49 for a transverse pivot pin 50 on which there is mounted for vertical tilting movement the side frame portions 5| which are received in openings 52 in a nearly circular supporting member 53 at the lower end of the boom. The member 53 is open at its lower side 54 and provides a projecting portion 55 having a flange 56 to which the boom body 34 is secured by bolts at 51. The side plates 5| are Journaled at 58 on suitable bearing sleeves surrounding the pivot pin 50. The boom body portion 34 is, desirably, cylindrical, and at its forward end is provided with a mounting flange 59 to which is secured a casing 60 which provides spaced bearings 6| and 62 for the forward boom portion 33. A worm wheel 63 is secured to the rearward end of the forward boom portion 33 between the bearings 6| and 62 and is rotatable by a handle 64 and a worm (not shown), the

latter journaled in the casing 60. The forward end of the boom member 33 carries an enlarged housing portion 66 transversely of which a pivot pin 61 extends. The pivot pin ls surrounded at its outer end by bearing sleeves 68 upon which plates 69 are journaled at the opposite ends of 61. The pin 61 is provided with a head 10 at one end and a handle 1| having a nut portion 12 cooperating with the opposite threaded end 13 of the pin member 61. The plates 69 are formed upon or connectedwith, as may be desired, a plate 15 having upstanding edges 16 upon which an inwardly directed flange member 11 is mounted, the plate 15 and the edges 16 and ange portion 11 cooperating to provide a bearing 18 for the base plate 19 of the casing 38 by which the drill feeding and guiding apparatus is housed. The plate 15 is traversed by a central opening 8| and the plate 19 is traversed by other openings 82 and 83 which communicate with the opening 8|.

Within the casing 38 and journaled in an upstanding pedestal or bearing support 85 therein and in a bearing 86 arranged in the forward portion of the casing 38 is a sleeve member 89 having an internally splined connection 90 with a hollow cylindrical, elongated, internally threaded drill rotating element 9 I, the latter supporting a chuck 92, of any suitable construction, at its outer end. Journaled also in a bearing in the pedestal portion 85 and in a bearing 96 at the rear end of the casing portion 38 is an elongated tubular member 91 having an internally splined connection with a slidable block 98 to which there is secured in non-rotatable relation a screw member 99 extending forwardly within the member 9| and threadedly engaging the internal threads of the latter.

It will be obvious that upon rotation of the member 89 a drill mounted inthe chuck 92 will be rotated, and that depending upon the direction of the threaded connection between the member 9| and the thread bar 99, there will, if the member 98 and thread bar 99 are held against rotation, be also longitudinal movement of the drill'in one direction. If the member 91 is also rotated. there will be, dependent upon the relative speed and direction of rotation of the member 91 as compared with those of the member 9|, fast forward feed, slow forward feed. or retraction. It is therefore evident that by controlling the directions and rates of rotations of members 89 and 91, any desired mode of operation of the drill mounted in the chuck 92 will be possible.

The adjusting mechanism for the boom and the driving devices for the members 89 and 91 will now be described. The rotatable base 3| is not power-adjustable with the apparatus shown, a1- though hydraulic devices for effecting such adjustment might be provided if desired. Instead, there is simply provided a releasable clamping device cooperating with the peripheral edge of the base flange 3| for locking the boom in any desired position after the boom has been swung thereto by the drill runner. l

The end of the motor'shaft 5 opposite from the truck wheel driving gearing drives a hydraulic pump I 05, which may be of any suitable type and whose construction is therefore not shown. The pump draws a suitable fluid, preferably oil, from a reservoir tank |06 mounted on the bed I of the truck, and delivers it downwardly through a connection |01 to a connection |08 beneath the truck body and forward through a connection |08 through the opening 4| and into the interior of the member 55. The supply line is there arranged in an open coil I0 passing around the transverse pivot member 50 and extends forwardly at I through the boom. Within the body portion of the boom isa T ||2 from which there branches a connection ||3 entering a four-way valve casing I I4 housing a four-way valve device (not shown) controlled by a handle I5. The manipulation of the handle will effect connection of the supply boom. The rear end of the cylinder ||8 is pivotally supported at |22 between the forwardly extending arms 48. 'I'he return connection to the supply tank |06 may now be described in part, and it will be noted that this includes portions, all of which are generally designated |24, generally paralleling the connections |01, |08, |09, ||0 and Within the boom body there is a T |25 connected in the return line |24 and connected by a connection |26 with the four-way valve apparatus ||4, so that when either end of the tilt cylinder ||8 is supplied with pressure, the other end may be vented back to the tank.

The connections and |24 extend forwardly and at opposite sides of the transverse pivot pin 61, turn upwardly into the interior of the casing 38, where they pass laterally, and enter a valve box .|29 secured to the casing 38. Within the valve box there is a pair of valve-receiving bores '|3I and |32 each housing a rotary valve, which valves are respectively numbered |33 and |34. The valves |33 and |34 have operating handles |35 and |36 and peripheral grooves |38 and |39, |40 and |4| respectively, the peripheral grooves |38 and |40 opening into grooves |43 adjacent the one end of the valve members, while the grooves |39 and |4| open into the two spaces |44 at the opposite ends of the valve-receiving bores. Grooves |43 are connected together through the valve chest, as at |45, and communicate with the supply line |I|, while at the opposite ends of the bores the spaces I 44 are connected by a passage |46 communicating with the return line |24'. Passages and |52 communicate with the vaivereceiving bore |3| in the same transverse plane with the nearer ends of the grooves 38 and |39. Similar passages |53 and |54 communicate with the valve bore |32 in the same transverse plane with the nearer ends of the valve grooves |40 and IM. This groove and passage arrangement is such that in one position of valve |33, passage |5| may be connected through groove |33 to supply, while passage |52 is connected to discharge through groove |39, and reverse connections are established in a different position of the valve |33. Similarly, Valve |34 in one position may connect passage |53 through groove |4| to discharge and passage |54 through groove |40 to supply, and upon movement to another position reverse the connections.

Within the casing 38 and adjacent the opposite ends thereof there are mounted reversible hydraulic motors |59 and |60 respectively, having drive shafts |6| and |62 reversely rotatable in accordance with the direction of rotation of the respective motors. `The drive shafts |6| and |62 carry drive pinions |63 and |64 respectively, and these drive pinions respectively mesh with driving gears |65 and |66 respectively mounted on and driving the cylindrical members 89 and 91.

The connections |5| and |52 extend to the reversible driving motor |59, and, depending upon whether supply is through |52 and exhaust through |5| or supply is through |5| and exhaust through |52, the motor |59 may be driven in either direction. Similarly, motor |60 is connected with the passages |53 and |54and, depending upon which of these passages is connected to supply and which to exhaust, motor |60 may be driven -in either direction. Since motor |60 effects rotation through the gearing and sleeve member described of the chuck carrying member 9|, and at any desired speed depending upon the degree of communication established by the adjustment of the valve |34, and since the motor |59 can drive in either direction and at any desired speed, depending on the adjustment of the valve |33, the thread bar 99, it will be evident that the drill can be rotated in either direction at any desired speed and concurrently feed in either direction at substantially any desired speed.

Due to the loops in the supply and discharge connections, upward and downward tilting of t-he boom can be effected by the boom-tilting cylinder I8 without undue strain upon the supply and return tubes. Similarly, due to the slack in the connections, the boom may be swung about its vertical turntable support device without unduly tensioning the supply and return connections, or limiting the range of movement materially. Due to the slack provided in the connections where the supply and return connections pass from the forward end of the boom through the opening 8| and into the casing 38, tilting of the support 15 about the pivot pin 61 is easily possible, and, moreover, the lateral pivotal adjustment of the entire casing 38 and supported parts Within the bearing 18 is easily possible. Manually controllable holding means |10 is provided to lock the casing 38 ln any desired position of adjustment.

- Rotation through the necessary angle of the forward boom portion 33 relative to the rearward boom portion 34 is also possible without undue strain upon the supply and return conduits.

In Fig. 1l there is illustrated a modied arrangement. Obviously the motors |59 and |60 may be arranged with one of their respective rotors coaxial with and'driving the members which their driving pinions drive in the form so far described. Fig. l1 shows a motor |60 having rotors |1| and |12, and the rotor |1| surrounds and is keyed to and drives the sleeve member 89, which is journaled in the motor housing in a suitable manner. Rotor |12 has a shaft |13. Fluid conducting passages, each operative as a supply or exhaust passage, are arranged at and |15; and to these the connections |53 and |54 may be brought. A similar motor, having one rotor surrounding and driving the member 91, may replace motor |59 and be controlled by handle |35 and valve |33. The mode of operation of this modication Will be obvious, and needs no explanation.

From the foregoing description it will be evident that I have provided an improved drilling apparatus having practically unrestricted freedom of adjustment, having power adjustment where a relatively large amount of power is required, having an extremely wide range of rotary speeds and of feeding speeds as well as complete control of direction of drive irrespective of direction of feed and complete control of direction of feed irrespective of direction ofrotation, in

which very simple parts are employed, and in which a great deal of power is available because of the very high pressures possible with hydraulic apparatus.

While there is in this application specically described one form and a modification which the invention may assume in practice, it will be understood thatthese are shown for purposes of illustration, and that the invention may be further modiied and embodied in various other forms without departing from its spirit or the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is:

1. In a drilling apparatus, a base, a motor driven pump thereon, drilling apparatus including members rotatable independently to effect drill rotation and drill feeding and together to effect drill rotation and variable drill feeding, driving motors for said members each having a rotor coaxial With one of said members, and fluid connections from said pump to said motors.

2. In a drilling apparatus, a drill, means for feeding and rotating said drill includingcoaxial relatively rotatable drill feeding and drill rotating elements, and independent motors one operatively connected to said drill rotating element and the other to said drill feeding element and each motor including a rotor coaxial with said rotating and feeding elements.

MORRIS P. HOLMES. 

